Joseph heckel and michael eichinger



JOSEPH HEGK'EL AND MICHAEL nicer-Noun, OF DECATUR, ILLINOIS.

Lettcrs'Patent No. 76,443, datedApm'l 7, 1868.

IMPROVED COMPOSITION FOR COVERING WOODEN BRIDGES, BUILDINGS, (inc.

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TO ALL WHOM IT MAY CONCERN: v p Be it, known that we, JOSEPH HEcKEL and MIcHAEL Ercnmenn, both of Decatur, ".iu the county of Macon,

and State of Illinois, have invented a new and improved Compositionfor Covering Wooden Structures, Bridges, 86s.; and we do hereby declare the following tube a' ful1,clear, and exact description of the same, suflicient to enable those skilled in the art to which our invention ap'pertains to fully understand and use it.

p The object of this invention is to protect wooden structures from fire, and to preserve them from decay, resulting from the weather, moisture, .&c. I

This invention is an improvement upon an invention for the same purpose, patented by Joseph Heck el, December 3, 1867, in which china-clay, oyster-shell lime, borax, litharge, and linseed-oil are the ingredients of the composition.

The present improvement consists in substituting plaster of Paris in the place of borax and in a new method of preparing some of the ingredients, all of which -we will now more particularly describe.

Wejfirst pulverize china-clay, and then'burn or calc ine'it in the same manner as stoneware is burnt. If the shell-lime, previously tousingtit, has been exposed to the action of the atmosphere, this also should be burnt over again, the object of the burning each being to expel every particle of moisture, and thereby prevent any shrinking and cracking of the composition; it also dries better.

We then take the materials in the following proportions, viz: Ten per cent. lithalge; twenty per cent. china-clay thirty per cent. oyster-shell lime; forty per ceritnplaster of Paris. Pulvcrize asrfine as the finest flour, and thoroughly mix it with linseed-oil, until the composition attains the properconsistency. It is then run through a paint-mill, and should, when running through, be collectedin the vessel for its reception in a little hill, and not run over its bottom.

If designed for fire and Water-proof cement, it should be of the consistency of paste; if for paint, more oil is required, but as little as possible should be used of thelat ter.

The color of this composition, when made up'in the above-named propo-rtions,is a light-brown; If'a lighter color is desired, the proportions of shell-lime and plaster ot'Paris should be changed, taking less of the former and more of the latter, without producing any marked alteration in the effect. 7

Having thus described our invention, what we claim as new therein, and desire to secure by Letters Patent, is I I r The composition above described, when compounded and used asand 'fOr the purposes specified.

JOSEPH HEGKEL,

MICHAEL EICHINGER. Witnesses:

POLE. B. ELY, S. W. Gnmnsrm. m 

